Cathode for electron tube

Details Cathode for electron tube Cathode for electron tube

H - Electricity

01

J

117/157, 117/225

H01J 1/14 (2006.01) H01J 1/142 (2006.01) H01J 19/06 (2006.01)

Patent

CA 1327145

ABSTRACT OF THE DISCLOSURE An oxide-coated cathode for an electron tube comprises a layer (2) of an electron-emissive substance. This layer (2) contains: an alkaline earth metal oxide as a principal component containing at least Ba; an oxide of Sc; and at least one heat-resisting oxide selected from the group consisting of oxides of A?, Si, Ta, V, Cr, Fe, Zr, Nb, Hf, Ta, Mo and W. - 16 -

591597

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